ZXSDR R8852E Product Description


ZTE Confidential & Proprietary 1


© 2018 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used

without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to

change without notice.


2 ZTE Confidential & Proprietary

TABLE OF CONTENTS

1 Overview ......................................................................................................... 4

1.1 Introduction ....................................................................................................... 4

1.2 Benefits ............................................................................................................. 4

1.3 Application Scenarios ....................................................................................... 6

2 Product Architectures .................................................................................... 7

2.1 Hardware Architecture ...................................................................................... 7

2.1.1 TRX .................................................................................................................. 7

2.1.2 DFL ................................................................................................................... 8

2.1.3 PA 8

2.1.4 Power ............................................................................................................... 9

2.2 Functionality ...................................................................................................... 9

3 Technical Specifications .............................................................................. 10

3.1 Physical Specifications.................................................................................... 10

3.2 Performance Specifications ............................................................................ 10

3.2.1 Operation Frequency Band ............................................................................. 10

3.2.2 Capacity .......................................................................................................... 11

3.2.3 ToC Output Power .......................................................................................... 11

3.2.4 Bandwidth ....................................................................................................... 12

3.2.5 Receiver Sensitivity ......................................................................................... 12

3.3 Power Specifications ....................................................................................... 12

3.3.1 Power Requirements ...................................................................................... 12

3.3.2 Power Consumption ........................................................................................ 13

3.4 Interface Specifications ................................................................................... 13

3.5 Transmission .................................................................................................. 15

3.6 Working Environment Specifications ............................................................... 15

3.7 Electromagnetic Compatibility Specifications .................................................. 15

3.8 Reliability Specifications .................................................................................. 16

4 Glossary ........................................................................................................ 17



FIGURES

Figure 1-1 Physical Appearance ......................................................................................... 4

Figure 1-2 Deployment Scenarios ....................................................................................... 6

Figure 2-1 System Structure ............................................................................................... 7

Figure 3-1 External Interfaces at the Bottom and Side .......................................................13

TABLES

Table 3-1 Physical Specifications.......................................................................................10

Table 3-2 Operation Frequency Band ................................................................................10

Table 3-3 Capacity .............................................................................................................11

Table 3-4 ToC Output Power .............................................................................................11

Table 3-5 LTE Cell Bandwidth ...........................................................................................12

Table 3-6 Static Receiver Sensitivity ..................................................................................12

Table 3-7 Power Supply .....................................................................................................12

Table 3-8 Power Consumption ...........................................................................................13

Table 3-9 Description of the External Interfaces at the Bottom ...........................................14

Table 3-10 Description of the External Interfaces on the Right Side ...................................14

Table 3-11 CPRI Interfaces ................................................................................................15

Table 3-12 Environment Specifications ..............................................................................15

Table 3-13 Electromagnetic Compatibility Specifications ...................................................16

Table 3-14 Reliability Characteristics .................................................................................16



1 Overview

1.1 Introduction

This document provides a high level description of ZTE ZXSDR R8852E (hereinafter

referred to as R8852E), which is the latest compact RRU (Remote Radio Unit) used in

ZTE wireless communication solution. Based on ZTE common innovative SDR platform,

R8852E can work in GSM, or LTE single mode or dual-mode ,and also can work in

GSM/LTE multi-mode in different frequency band. The volume of R8852E is 12 L, and its

weight is 16 kg.

R8852E features as small volume, high integration, wide working bandwidth and high

output power.

The document is designed to give an overview of the characteristics of R8852E. Three

types are introduced in this document, 1800 MHz ,2100 MHz and 900MHz, with its key

benefits, the architecture, functionality and services. The document also describes the

system capabilities.

Figure 1-1 Physical Appearance

NOTE: In this document, G is short for GSM, U is short for UMTS, L is short for FDD

LTE.



1.2 Benefits

Smallest Size, High Integration

R8852E, with 2 * 80W rack top output power, has the smallest size in the industry.

With improvement in material and design, R8852E has smaller size than previous

product, saving 30% in weight and 40% in volume. It provides convenience in

transportation, installation and maintenance. It has lower load bearing requirements

for tower or poles to be installed on. This saves CAPEX for operators.

Full working bandwidth, High output power, High performance

R8852E has 2*80W of high TOC output power. It enables operators to deploy sites

with large capacity & high output power for each cell, helps to absorb more traffic

and provide better signal for subscribers.

As frequency spectrums become scarce, resources allocated for operators tend to

be characterized with fragmentation and large span. RRUs with full working

bandwidth integrate more spectrum resources and help to decrease hardware

investment exponentially.

SDR 2T4R design to ensure one clear and simple network

R8852E supports GSM, UMTS and LTE multiple technologies or supports GSM/LTE

multiple technologies. Design of R8852E 2T4R channels ensures the smooth

evolution of the system from GSM to LTE 2*4 MIMO. Instead of running hardware

on independent platforms for each technology, operators can implement various

wireless technologies through software configuration on the same hardware platform.

It fully satisfies operators’ requirements of hybrid network deployment and long term

evolution with lowest cost.

Lower Total Cost of Ownership (TCO)

ZXSDR R8852E’s PA adopts advanced efficiency enhancement technologies to

realize high power efficiency, such as Doherty PA, DPD linear technology and MCPA



technology. It also supports dynamic adaptive PA power supply due to the output

power. Power consumption can be greatly decreased together with these features.

1.3 Application Scenarios

R8852E as the Remote Radio Unit and Baseband Unit (BBU) comprise distributed macro

base station BS8700. R8852E is suitable for high traffic area. Typical deployment

scenarios of R8852E are shown in the following figure:

Figure 1-2 Deployment Scenarios

B8200 Accommodation

RRU Installation

BS8700

R8852E



2 Product Architectures

2.1 Hardware Architecture

The hardware architecture of R8852E is shown in Figure 2-1.

Figure 2-1 System Structure

R8852E includes 4 main hardware modules:

Transceiver (TRX)

Duplex Filters (DFL)

Power Amplifier (PA)

Power module (POWER)

2.1.1 TRX

The TRX has following functions.

Provides 4 receiving signals and 2 transmitting signals;

POWER

PA_CTRL

FWD/REV

TX1_IN

TX2_IN

FWD/REV

PA_PWR1/PA_PWR2

TX1_OUT

TX2_OUT

PATX1

TX2

LED

MON

DBG

AISG

OPT1

OPT2

POWER

GND

CONTROL

ANT1(TX1/RX1)

ANT2(RX2)

ANT3(RX3)

ANT4(TX4/RX4)

R8852E

TRXDFL



Converts uplink/downlink radio signal;

Multiplexes downlink IQ signal and de-multiplexes uplink IQ signal;

Amplifies and filters signals and implements A/D & D/A conversion;

Implements low noise amplifier (LNA) function;

Converts optical and electric signal;

Captures reference clock signal from baseband unit and provides clock signal to

other units;

Measures and reports voltage standing wave ratio (VSWR);

Implements hardware failure self-detection and alarm;

Detects and alarms over-heat situation;

Implements low noise amplifier function;

Provides communication interfaces of 2 CPRI interfaces, 1 DB15 interface for dry

contacts of external monitor equipment communication or AISG connection through

different kind of cables;

Implements reset function.

2.1.2 DFL

The DFL has following functions.

Combines and isolates transmitted and received signals;

Filters the transmitted signal and received signal;

Monitors DFL alarm.

2.1.3 PA

The PA has following functions.



Performs radio signal amplifying function;

Reports temperature information;

Implements over-heat, over-power and over-standing wave protecting function.

2.1.4 Power

The POWER has following functions.

Provides power supply function;

Monitors input over-voltage/under-voltage, input power outage, output over-voltage/

under-voltage, output over-current alarm, and reports these situations to QTR board.

2.2 Functionality

R8852E is the remote radio unit of distributed base station. The signal is transmitted/

received through R8852E to/from base band processing unit for further processing via

standard CPRI interface.

By applying the distributed system, the feeder loss will be eliminated when the radio unit

is positioned close to the antenna. The coverage is enlarged with this solution.

The functions of R8852E include:

Supports 900,1800 ,2100 MHz frequency bands;

Supports LTE configuration of 1.4/3/5/10/15/20 MHz scalable bandwidth in 1800

MHz and 5/10/15/20 MHz in 2100 MHz;

Supports 2T4R in one box which can optimize spectrum efficiency greatly and

improve network uplink performance;

Supports 256QAM modulation in LTE downlink and 64QAM in uplink;

Supports transmit power report function for every carrier;

Supports overload protection function for power amplifier;



Supports transmit channel switching on/off function;

Supports non-interruptible services in adjacent modules in case of one R8852E

software failure.

3 Technical Specifications

3.1 Physical Specifications

R8852E is the multi-carrier RRU with two transmitters. The physical Specifications are

listed below.

Table 3-1 Physical Specifications

Item Specifications

Size (H*W*D) (mm) 415× 296 × 104

Weight (kg) 16

Color Silver gray

3.2 Performance Specifications

3.2.1 Operation Frequency Band

Table 3-2 Operation Frequency Band

RRU Type Operation Frequency Band

R8852E S1800

B3, 1800 MHz

Rx: 1710 – 1785 MHz

Tx: 1805 – 1880 MHz

R8852E S2100

B1, 2100 MHz

Rx: 1920 – 1980 MHz

Tx: 2110 – 2170 MHz

R8852E S9000 B8,800MHz



RRU Type Operation Frequency Band

Rx:880~915MHz

Tx: 925~960MHz

3.2.2 Capacity

Table 3-3 Capacity

Band System RRU Capacity

R8852E

S1800

LTE single mode 2 2T4R cells

GL dual-mode 8 GSM TRXs + 1 LTE 2T4R cell, or

4 GSM TRXs + 2 LTE 2T4R cell

R8852E

S2100

LTE single mode 2 2T4R cells

UL dual-mode 2 LTE 2T4R cells + 4 UMTS carriers non-MIMO

R8852E

S9000

LTE single mode 2 LTE 10MHz 2T4R Cells

GL dual-mode 8 GSM TRXs + 1 LTE 10MHz 2T4R Cell, or

4 GSM TRXs + 2 LTE 10MHz 2T4R Cell

3.2.3 ToC Output Power

Table 3-4 ToC Output Power

RRU Type TOC Output Power[1]

R8852E 2*80W

Note: When “ZGO-04-01-011 Power Boost for 8PSK” is applied in GSM mode, the TOC output

power achieves the same in 8PSK modulation as in GMSK.

1 The TOC here means the max capability of the hardware. The specific TOC output power is limited by the license.



3.2.4 Bandwidth

R8852E supports all LTE cell bandwidth defined in 3GPP.

Table 3-5 LTE Cell Bandwidth

RRU Type LTE Bandwidth

R8852E S1800 1.4, 3, 5, 10, 15 & 20 MHz

R8852E S2100 5, 10, 15 & 20 MHz

3.2.5 Receiver Sensitivity

The receiver sensitivity of R8852E is shown as following table:

Table 3-6 Static Receiver Sensitivity

Mode Frequency

Spectrum (MHz)

Single Antenna

(dBm)

Dual Antennas

(dBm)

Four Antennas

(dBm)

GSM 1800 -113.5 -116 N/A

UMTS 2100 -126.5 -129.2 N/A

LTE 1800/2100 -106.4 -109.2 -112

3.3 Power Specifications

3.3.1 Power Requirements

The following table describes the power supply and the fluctuation range.

Table 3-7 Power Supply

Item Index

Power Supply DC: -48 V (-37 V – -60 V DC)

R8852E supports integrated lightning protection module for DC power supply. Its

protection level is 20 KA.



3.3.2 Power Consumption

Power consumptions of R8852E at normal ambient temperature are shown in the table

below:

Table 3-8 Power Consumption

RRU Type Configuration Typical Power

Consumption

Peak Power

Consumption

R8852E

S1800

4 GSM TRXs + 1 LTE cell, 20W/GSM

TRX, 2*40W/LTE cell 310W 510W

2 LTE cells, 2*20W/LTE cell 275W 510W

R8852E

S2100

2 LTE cells, 2*20W/LTE cell 280W 520W

2 UMTS carriers +1 LTE cell,

40W/UMTS carrier, 2*40W/LTE cell 340W 520W

3.4 Interface Specifications

The external interfaces of the R8852E are located at the bottom and on the front side of

the chassis.

Figure 3-1 External Interfaces at the Bottom and Side



For a description of the external interfaces at the bottom of the R8852E chassis, refer to

the following table.

Table 3-9 Description of the External Interfaces at the Bottom

No. Label Interface Interface

Type/Connector

1 AISG/MON

AISG equipment interface

MON external monitoring

interface

LMT O&M Ethernet interface

DB15 connector

2 GND Protective grounding interface 16 mm2 yellow-green

rectangular terminal

3 ANT1 (TX/RX) TX/RX antenna interface

Built-in one way NSBT

50 Ω DIN-mode

connector

4 ANT2 (RX) RX antenna interface 50 Ω DIN-mode

connector

5 ANT3 (RX) RX antenna interface 50 Ω DIN-mode

connector

6 ANT4 (TX/RX) TX/RX antenna interface 50 Ω DIN-mode

connector

For a description of the external interfaces on the right side of the R8852E chassis, refer

to the following table.

Table 3-10 Description of the External Interfaces on the Right Side

No. Label Interface Interface

Type/Connector

7 OPT1

Communication between the RRU

and a BBU, or RRU cascading

interface

LC-type optical interface

(IEC 874)

8 OPT2 RRU cascading interface LC-type optical interface

(IEC 874)

9 PWR Power input interface 2-pin customized

connector



Additionally, R8852E provides 6 LED indicators. The indicators on the R8852E panel

indicate the operating status of the RRU.

3.5 Transmission

R8852E is connected to BBU through CPRI interfaces.

For more information about CPRI interfaces, refer to the following table.

Table 3-11 CPRI Interfaces

Item Value Interface Type Speed Standard

CPRI interface 2 SFP (LC) 6.144 Gbps [2] CPRI V4.2

3.6 Working Environment Specifications

Table 3-12 Environment Specifications

Item Characteristics

Temperature -40 to +55 °C

Relative Humidity 5% to 100%

Waterproof/Dustproof IP65

Ground

≤5 Ω; earth resistance can be less than 10 Ω in

thunder-less area where thunderstorm days is less

than 20 per year.

3.7 Electromagnetic Compatibility Specifications

2 The speed here refers to the max capability of the hardware. The specific speed depends on the optical module configuration.



Table 3-13 Electromagnetic Compatibility Specifications

Item Characteristics

Static Discharge Immunity Contact Discharge: ±6000V

Air Discharge: ±8000V

Surge Impact Immunity DC Power port Line(Ground): ±2000V

3.8 Reliability Specifications

R8852E system reliability conforms to the national military GJB/Z299B Electronic

Equipment Reliability Estimation Manual and US military handbook MIL-HDBK-217F

Electronic Equipment Reliability Estimation.

Table 3-14 Reliability Characteristics

Item R8852E

MTBF ≥565,000 hours

MTTR 1 hour

Availability index ≥99.999823%

Down duration ≤0.930 min/year



4 Glossary Abbreviations Full Name

BBU Base Band processing Unit

BSP Board Support Package

CPRI Common Public Radio Interface

DL Downlink

DFL Duplexer & Filters

DPD Digital Pre-Distortion

GSM Global System for Mobile communications

LMT Local Maintenance Terminal

LNA Low-Noise-Amplifier

LTE Long Term Evolution

MCPA Multi-Carrier Power Amplifier

MIMO Multi Input Multi Output

MTBF Mean Time Between Failures

MTTR Mean Time To Recovery

OAM Operating And Maintenance

OSS Operation Support Sub-system

PA Power Amplifier

PWR Power

QTR Quad-channel Transceiver

RF Radio Frequency

RRU Remote Radio Unit

SDR Software Defined Radio

ToC Top of Cabinet

UE User Equipment

UL Uplink

VSWR Voltage Standing Wave Ratio

ZXSDR R8852E Product Description -...

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